Klarna Checkout – Compatible plugins
Google Analytics / E-commerce tracking
- Google Tag Manager for WordPress
Good resources to start with is how to setup Enhanced E-commerce tracking and the rest of the How To articles around the plugin and Google Tag Manager. - MonsterInsights Pro & E-Commerce addon
Gift Cards
- Gift Cards - Approved WooCommerce Plugin
- PW WooCommerce Gift Cards
- Smart Coupons
- YITH WooCommerce Gift Cards
Multi-currency
- Aelia Currency Switcher for WooCommerce
- WooCommerce Multilingual – run WooCommerce with WPML
- WOOCS - WooCommerce Currency Switcher